Legalities

This is the page where I actually cite what I have used from other sources so I don't get sued and stuff...

1. http://api.ning.com/files/fM5HlXiIUfI4I7mP3qXp3fjZlqIOsDYrYMvrIsVMdLi-Kf1SDsER4EmMYEVwmS97XFQxK46wZp35HSDABInz6Iz32Cr5uenl/hitchhikers_guide_to_galaxy.2005.teaser.jpg

2. Downing, D. (1996). Calculus: the easy way. Barron's Educational Series.